fix: 统一所有 JSON 文件读写为 UTF-8 编码

Windows 中文环境默认编码为 GBK，未指定 encoding 会导致
config.json/all_keys.json 解析失败。修复 9 个文件共 17 处。

Closes #32

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config.py

@@ -169,7 +169,7 @@ def load_config():
     cfg = {}
     if os.path.exists(CONFIG_FILE):
         try:
-            with open(CONFIG_FILE) as f:
+            with open(CONFIG_FILE, encoding="utf-8") as f:
                 cfg = json.load(f)
         except json.JSONDecodeError:
             print(f"[!] {CONFIG_FILE} 格式损坏，将使用默认配置")
@@ -181,12 +181,12 @@ def load_config():
         if detected:
             print(f"[+] 自动检测到微信数据目录: {detected}")
             cfg = {**_DEFAULT, **cfg, "db_dir": detected}
-            with open(CONFIG_FILE, "w") as f:
+            with open(CONFIG_FILE, "w", encoding="utf-8") as f:
                 json.dump(cfg, f, indent=4, ensure_ascii=False)
             print(f"[+] 已保存到: {CONFIG_FILE}")
         else:
             if not os.path.exists(CONFIG_FILE):
-                with open(CONFIG_FILE, "w") as f:
+                with open(CONFIG_FILE, "w", encoding="utf-8") as f:
                     json.dump(_DEFAULT, f, indent=4, ensure_ascii=False)
             print(f"[!] 未能自动检测微信数据目录")
             print(f"    请手动编辑 {CONFIG_FILE} 中的 db_dir 字段")

decrypt_db.py

@@ -116,7 +116,7 @@ def main():
         print("请先运行 find_all_keys.py")
         sys.exit(1)
 
-    with open(KEYS_FILE) as f:
+    with open(KEYS_FILE, encoding="utf-8") as f:
         keys = json.load(f)
 
     keys = strip_key_metadata(keys)

find_image_key.py

@@ -334,7 +334,7 @@ def verify_and_decrypt(attach_dir, aes_key_str, xor_key):
 
 def main():
     config_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'config.json')
-    with open(config_path) as f:
+    with open(config_path, encoding="utf-8") as f:
         config = json.load(f)
 
     db_dir = config['db_dir']
@@ -392,7 +392,7 @@ def main():
         config['image_aes_key'] = aes_key
         if xor_key is not None:
             config['image_xor_key'] = xor_key
-        with open(config_path, 'w') as f:
+        with open(config_path, 'w', encoding="utf-8") as f:
             json.dump(config, f, indent=2, ensure_ascii=False)
         print(f"Saved to {config_path}", flush=True)
 

find_image_key_monitor.py

@@ -227,7 +227,7 @@ def verify_and_decrypt(attach_dir, aes_key_str, xor_key):
 
 def main():
     config_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'config.json')
-    with open(config_path) as f:
+    with open(config_path, encoding="utf-8") as f:
         config = json.load(f)
 
     db_dir = config['db_dir']
@@ -292,7 +292,7 @@ def main():
                 config['image_aes_key'] = aes_key
                 if xor_key is not None:
                     config['image_xor_key'] = xor_key
-                with open(config_path, 'w') as f:
+                with open(config_path, 'w', encoding="utf-8") as f:
                     json.dump(config, f, indent=2, ensure_ascii=False)
                 print(f"Saved to {config_path}", flush=True)
 

latency_test.py

@@ -15,7 +15,7 @@ DB_DIR = _cfg["db_dir"]
 KEYS_FILE = _cfg["keys_file"]
 DECRYPTED = os.path.join(_cfg["decrypted_dir"], "session", "session.db")
 
-with open(KEYS_FILE) as f:
+with open(KEYS_FILE, encoding="utf-8") as f:
     keys = json.load(f)
 enc_key = bytes.fromhex(keys["session/session.db"]["enc_key"])
 

main.py

@@ -28,7 +28,7 @@ def ensure_keys(keys_file, db_dir):
     """确保密钥文件存在且匹配当前 db_dir，否则重新提取"""
     if os.path.exists(keys_file):
         try:
-            with open(keys_file) as f:
+            with open(keys_file, encoding="utf-8") as f:
                 keys = json.load(f)
         except (json.JSONDecodeError, ValueError):
             keys = {}
@@ -59,7 +59,7 @@ def ensure_keys(keys_file, db_dir):
         print("[!] 密钥提取失败")
         sys.exit(1)
     try:
-        with open(keys_file) as f:
+        with open(keys_file, encoding="utf-8") as f:
             keys = json.load(f)
     except (json.JSONDecodeError, ValueError):
         keys = {}

mcp_server.py

@@ -29,7 +29,7 @@ WAL_FRAME_HEADER_SZ = 24
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 CONFIG_FILE = os.path.join(SCRIPT_DIR, "config.json")
 
-with open(CONFIG_FILE) as f:
+with open(CONFIG_FILE, encoding="utf-8") as f:
     _cfg = json.load(f)
 for _key in ("keys_file", "decrypted_dir"):
     if _key in _cfg and not os.path.isabs(_cfg[_key]):
@@ -52,7 +52,7 @@ if not DECODED_IMAGE_DIR:
 elif not os.path.isabs(DECODED_IMAGE_DIR):
     DECODED_IMAGE_DIR = os.path.join(SCRIPT_DIR, DECODED_IMAGE_DIR)
 
-with open(KEYS_FILE) as f:
+with open(KEYS_FILE, encoding="utf-8") as f:
     ALL_KEYS = strip_key_metadata(json.load(f))
 
 # ============ 解密函数 ============
@@ -143,7 +143,7 @@ class DBCache:
         if not os.path.exists(self.MTIME_FILE):
             return
         try:
-            with open(self.MTIME_FILE) as f:
+            with open(self.MTIME_FILE, encoding="utf-8") as f:
                 saved = json.load(f)
         except (json.JSONDecodeError, OSError):
             return
@@ -172,7 +172,7 @@ class DBCache:
         for rel_key, (db_mt, wal_mt, path) in self._cache.items():
             data[rel_key] = {"db_mt": db_mt, "wal_mt": wal_mt, "path": path}
         try:
-            with open(self.MTIME_FILE, 'w') as f:
+            with open(self.MTIME_FILE, 'w', encoding="utf-8") as f:
                 json.dump(data, f)
         except OSError:
             pass

monitor.py

@@ -149,7 +149,7 @@ def main():
     print("=" * 60)
 
     # 加载密钥
-    with open(KEYS_FILE) as f:
+    with open(KEYS_FILE, encoding="utf-8") as f:
         keys = strip_key_metadata(json.load(f))
 
     session_key_info = get_key_info(keys, os.path.join("session", "session.db"))

monitor_web.py

@@ -1883,7 +1883,7 @@ def main():
     print("  微信实时监听 (WAL增量 + SSE推送)", flush=True)
     print("=" * 60, flush=True)
 
-    with open(KEYS_FILE) as f:
+    with open(KEYS_FILE, encoding="utf-8") as f:
         keys = strip_key_metadata(json.load(f))
 
     session_key_info = get_key_info(keys, os.path.join("session", "session.db"))